Pollution from Gold mining: https://sciencing.com/types-pollution-generated-gold-mining-22598.html https://sciencing.com/types-pollution-generated-gold-mining-

Pollution from Gold mining: https://sciencing.com/types-pollution-generated-gold-mining-22598.html https://sciencing.com/types-pollution-generated-gold-mining-... A very rough estimate: World wide Bitcoin mining operation spends per year around 60% as much electricity as all of USA's bank offices: https://news.ycombinator.com/item?id=15615601 https://news.ycombinator.com/item?id=15615601 With Bitcoin mining there is a high incentive to actually use renewable energy sources and could be physically outsourced to places where building green power plants is otherwise not practical due to the limits of creating a power grid to make such a power plant profitable.